Where are other leptons and hadrons in atoms?

[Chemist@]

Just one quick question I couldn't find an answer on the internet to, after a long search.
We are taught that atoms are made from protons, neutrons and electrons only. There are many other leptons and hadrons existing, but where are they in this story?

 

[tiny-tim]

Hi Chemist@!

Just one quick question I couldn't find an answer on the internet to, after a long search.

ah, you didn't try http://en.wikipedia.org/wiki/Exotic_atom

 

[Chemist@]

Okay, so in a usual atom, only protons, electrons and neutrons exist. But how are those exotics produced?

 

[jtbell]

You smack "normal" particles together with high energies at places like CERN and Fermilab. Some of the energy creates the masses of the "new" particles.

 

[Chemist@]

Okay, thanks.